Just for general consumption, here are the applicable rules in Nevada:
NRS 202.3667 states that a CCW permitee MUST carry his/her permit (or copy -photocopy that is- of his/her permit) AND proper identification (like driver's license, passport ID, etc) at all times when in possession of a concealed firearm, and any violation of this law comes under NRS 202.350 which defiles the illegal possession of a concealed firearm (NRS202.305 subparagraph [d] part {3}) as a CATEGORY C FELONY (and shall be arrested, weapon confiscated and destroyed); if the subject is a CCW permitee without his/her permit, it is a gross misdemeanor (in NV all misdemeanors are arrestible offenses) and subject to a $25 civil penalty for each violation AND (at the discretion of the arresting officer) forfeiture of the firearm (confiscation and destruction).
IN OTHER WORDS, if a cop gets called for a "man with a gun" report, and you either (A) don't have your CCW permit with you, or (B) don't have other ID on you, or (C) Both, then you get fined and can be arrested on misdemeanor possession of a concealed weapon; if you don't have a CCW, it is felonious possession. Since the cop had to respond to a citizen's call-in, your chances of getting off without being arrested are nil, even with a CCW permit, because he has to do the paperwork on the call anyway.
NV is an open-carry state (with Shall-Issue CCW rule), so you can open carry a firearm without a permit (provided you are over 21 and can legally posses a handgun, no warrants, no felony record) AS LONG AS the firearm is "WORN IN PLAIN VIEW FROM THE FRONT" and can be carried loaded.
HOWEVER, there are places where it is considered to be "ethically inappropriate" to open-carry, even though legal. For instance, in front of or around a school, child care facility, library, government building, or other places "of public resort" such as parks. These could lead to a "man-with-a-gun" call to police, and possibly charges of "inciting public panic" (a gross misdemeanor). During public events at convention plazas, city center, and such, where they temporarily suspend the "open container of alcohol" prohibition for pedestrians, it becomes illegal (temporarily) to open carry.
By the way, DUI in possession of a firearm is a misdemeanor (NRS 202.257) except when his/she is INSIDE his/her home. DUI is 0.08% Blood Alcohol Content. A CCW permitee can be asked to submit for a field BAC test (breathalyzer) at any time by any LEO, and is required to submit by law; refusal will result in blood samples being forcibly taken, using any amount of force as may be deemed necessary (up to and including tazing).
So, if you have a permit (but left it at home) and a gun on your hip under your jacket, you cannot tuck your jacket around it to make it open carry because it is no longer easily visible from the front and back. To be "open-carry" there must be no chance of any clothing article to cover the firearm from view.
You can carry as many concealed weapons as you want at any time, as long as you have a CCW permit that authorizes them (categorized simply as Revolver or Semiauto). Some states only allow you to carry one concealed firearm at a time. Just make sure you spread them out on your body, just so you don't walk lopsided.
You can carry a loaded firearm in your car, concealed anywhere in the car (or motorcycle) even without a CCW permit (SEE EXCEPTIONS 1 and 2, below). The permit allows you to carry it on your PERSON. Restriction is: without a CCW permit, it cannot be inside a purse, handbag, or backpack because when you exit the vehicle you can take the bag with you, and on your person it becomes a concealed weapon requiring a CCW permit.
EXCEPTION 1: You cannot have a firearm on Indian land, permit or not. It will be confiscated and you will have to go to Tribal Court for the charge, and your chances of getting the gun back are slim. Fines have been known to be very high. The sole exception is that you are allowed to have guns (loaded or unloaded) in your car or on your person, PROVIDED that you are on a street (and about 15 feet on either side of the street) maintained by the city or state (not the Tribe), such as a highway that bisects Tribal land in which case you are safe, just don't pull onto a "private" road owned by the Tribe, such as the road to the smoke shop. Or the Tribal casino. Or the Tribal Casino parking lot!
EXCEPTION 2: In Clark County (Greater Las Vegas area and the city of Henderson) you MUST have a CCW permit to carry a firearm in your car, loaded or unloaded, regardless of where it is in your car. No other counties in Nevada have this restriction.
You can concealed carry (with permit) in banks, churches, casinos and bars, nightclubs, or brothels (yes, legal in NV), and hospitals. You can disregard signs prohibiting firearms when you are on or entering PRIVATE PROPERTY. Many casinos here post no-firearms-or-deadly-weapons signs. You can ignore them. Management can ask you to leave, and you MUST comply, else you are automatically guilty of simple trespass. If police are called to eject you and you resist, it is resisting a police officer while in possession of a concealed weapon (felony).
NOTE that in Arizona (constitutional carry state), if a bar or restaurant has a sign prohibiting firearms on the premises -even though it is private property- you need to leave your gun in the car. (Used to be, you couldn't carry in any bar or restaurant that sold alcohol)
NOTE that in some other states, you cannot carry in a church.
NOTE that is California, you cannot carry a loaded gun in your car without a CA CCW permit (which is resident-only and is extremely difficult to get; CA is a "may-issue" state and you need to justify it even if you meet the legal requirements to apply for one). Handguns may be transported unloaded and in a locked hard-sided case located as far away as possible from the driver's seat. It's a pain in the butt everytime we drive to CA!
In NV, you cannot carry (without extra paperwork and other legal requirements) even with a CCW in a school, public or private, or in a child care facility (not including hospitals unless it is a dedicated child-care private hospital), any government building (police station, highway patrol office, library, courthouse, airport, etc). You CAN, however, have the gun in your car parked in the street, as long as the street is open to the public. For example, you cannot have a gun on school campus, but you can park on the sidewalk (which belongs to the city, not the school) on the street (which again belongs to the city, not the school) and leave your gun in the car. I have parked in the parking structure at the airport and left my gun in the car. I have never brought the gun into the building (a definite no-no!).
You can carry concealed with CCW in State and National Parks, but you cannot enter any building in the park....the restrooms, the ranger station, the convenience store, all of those are owned by the government and are considered "public buildings". So hide your gun in the bushes if you need to use the restroom, and if you have an "oops!", don't go into the ranger's office and ask them for a magnet to get your gun outta the toilet.
IF AND ONLY IF you have a CCW and faced a legitimate "deadly force" situation where you had to fire, and your shooting resulted in "the unintended death of another" as when the bullet goes thru the wall, flies across the street, and beans your neighbor in the head (which is "Excusable Homicide by Misadventure" NRS 200.180), and the circumstances validate the inadvertent death of another during a legitimate use deadly force, under NRS 200.190 ("Justifiable or Excusable Homicide NOT Punishable") then "the person indicted shall, upon his trial, be FULLY ACQUITTED AND DISCHARGED" and that "An action to recover damages shall not prosper"....meaning IF you had a CCW, even if you were at home drunk as a skunk, and someone broke into (or was attempting to break into) your home, and you shot the attacker/intruder/assailant and missed and accidentally killed an innocent bystander, you will NOT be charged with homicide or manslaughter, and you CANNOT be sued in civil court.
There are a host of "nitty-gritty" laws, conditions, and regulations, but those are the major ones.
Hope it helps someone!